Structural Engineering
Across MetroWest Boston

Third Rock Engineering is based in Hopkinton, Massachusetts, and serves homeowners, contractors, and commercial clients within a roughly 30-minute drive across MetroWest Boston and the Blackstone Valley.

You receive direct access to a senior licensed Professional Engineer on every project, regardless of which town you’re in.

Towns We Serve

Ashland, MA

Bellingham, MA

Berlin, MA

Bolton, MA

Boston, MA

Boxborough, MA

Boylston, MA

Clinton, MA

Framingham, MA

Franklin, MA

Grafton, MA

Holliston, MA

Hopedale, MA

Hopkinton, MA

Hudson, MA

Marlborough, MA

Medfield, MA

Medway, MA

Milford, MA

Millis, MA

Natick, MA

Needham, MA

Newton, MA

Norfolk, MA

Northborough, MA

Northbridge, MA

Plainville, MA

Sherborn, MA

Shrewsbury, MA

Southborough, MA

Stow, MA

Sudbury, MA

Upton, MA

Uxbridge, MA

Wellesley, MA

Westborough, MA

Weston, MA

Wrentham, MA

About

Meet Andrew Hruby, P.E.

Andrew J. Hruby, P.E., founded Third Rock Engineering after 20+ years of field and design experience across residential, industrial, and security projects in Massachusetts. He is a licensed Professional Engineer in the Commonwealth of Massachusetts, a member of the American Society of Civil Engineers, and carries professional liability (Errors & Omissions) insurance. When you work with Third Rock, you work directly with Andrew from site visit through permitting, which means faster answers, practical solutions, and no surprises mid-project.

20+
Years of experience
P.E.
MA Licensed
ASCE
Member
E&O
Insured

Outside the Standard Service Area?

Emergency consultations and short-notice visits may extend beyond our standard service area. Call (617) 507-9776 to discuss your project and location.

What Clients Say

Real projects. Real outcomes.

From sagging 1920s floors to six-figure platform redesigns that came in at half the estimate.

★ ★ ★ ★ ★
"My 1920s house floors in Charlton were sagging and bowing pretty badly. Third Rock took detailed measurements, created footing, support column, and beam connection drawings which were quickly approved by the building inspector. Well done, and no more sloping floors!"
JF
Josh F.
Residential · Charlton, MA
★ ★ ★ ★ ★
"Third Rock was hired to design a platform around an industrial equipment skid. Initial estimates had it at almost $100k. They proposed a custom foundation that set the equipment slightly above grade at less than half the price. Nice outside-the-box thinking."
JR
John R.
Industrial · Northborough, MA
★ ★ ★ ★ ★
"Andrew designed the framing for a second-floor addition on my home in Holliston. He took the time to answer any questions I had and also came by to help my contractor with questions during construction. Couldn't be happier with the result."
DC
Dave C.
Residential · Holliston, MA